2010 CTS4 sedan
Thanks. I do realize that. I have disassembled the center console and have had the stereo on my bench and have run tests on it. I suspect that there's a hairline crack somewhere that is temperature sensitive.NorthernSRX im sorry to say this but what your describing is a electronic failure inside the stereo. Your ipod works fine because it is basically its own stereo once you plug it in, it only comunicates with the pop-up screen n speakers/amp. Your going to have to buy a new stereo if you want it to work right. GM Can get you a certified refurbished one im sure. Or you could take a chance n buy from online for cheaper (i would rather go through GM to purchase the stereo). It's up to you. Good luck.
Of course, it's perfectly fine as it is and I don't need to replace it as long as it is stable in its current state - which it has been for two years.